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54 Commits

Author SHA1 Message Date
Rusty Russell
7a9df37ef3 lightningd/subd: support multiple fds sent at once in normal messages. 
Rather than returning SUBD_NEED_FD, callback returns how many fds it needs.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2017-03-20 07:50:53 +10:30
Rusty Russell
38bffc0f0c lightningd/subd: support multiple fds sent at once in request reply. 
Instead of indicating where to place the fd, you say how many: the
fd array gets passed into the callback.

This is also clearer for the users.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2017-03-20 07:50:53 +10:30
Rusty Russell
83466b2b32 ccan: update to get close option to io/fdpass. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2017-03-20 07:50:53 +10:30
Rusty Russell
95f41287f0 lightningd/subd: new code for subdaemons. 
This uses a single fd for both status and control.

To make this work, we enforce the convention that replies are the same
as requests + 100, and that their name ends in "_REPLY".

This also means that various daemons can simply exit when done; there's
no race between reading request and closing status fds.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2017-03-10 21:45:55 +10:30